Adjusting The Synchronous Tap Control - Mitsubishi MELDAS MDS-C1 Instruction Manual

5-3-4

Adjusting the synchronous tap control

(1) Confirming the default parameters
Confirm that the parameters are correctly set according to the machine specifications. Pay special
attention to the following points.
1) Position loop gain
The position loop gain must be the same as the servo axis used for interpolation control during
synchronous tap control.
Position loop gain for synchronous tap control
Position loop gain 2 for synchronous tap control
Position loop gain 3 for synchronous tap control
2) High-gain servo synchronous compensation
The synchronous tap control specifications SP193 bit8 must be set according to the
specification of the servo drive unit used for interpolation control during synchronous tap
control.
Synchronous compensation valid = High-gain servo :
MDS-C1-V1/V2 (for high-gain setting), MDS-B-V14/V24
Synchronous compensation invalid = Standard servo :
MDS-C1-V1/V2 (for standard setting), MDS-B-V1/V2, MDS-B-SVJ2
<Spindle parameters>
No. Abbrev.
SP009 PGT Synchronized tapping Position loop gain
Synchronized tapping specifications
SP193 SPECT* (The standard value is set according to the servo drive for interpolation
control.)
SP194 VGTP* Synchronized tapping speed loop gain proportional term
SP195 VGTI* Synchronized tapping speed loop gain integral term
SP196 VGTD* Synchronized tapping speed loop gain delay advance term
SP197 Fixed control constant
SP198 VCGT* Synchronized tapping target value of variable speed loop proportional gain
Synchronized tapping change starting speed of variable speed loop
SP199 VCST*
proportional gain
SP200 FFC1* Synchronized tapping acceleration feed forward gain (gear 1)
SP201 FFC2* Synchronized tapping acceleration feed forward gain (gear 2)
SP202 FFC3* Synchronized tapping acceleration feed forward gain (gear 3)
SP203 FFC4* Synchronized tapping acceleration feed forward gain (gear 4)
SP214 TZRN Synchronized tapping zero point return speed
SP215 TPDT Synchronized tapping zero point return deceleration rate
SP216 TPST Synchronized tapping zero point return shift amount
SP217 TINP Synchronized tapping in-position width
SP218 TODR* Synchronized tapping excessive error width (1pulse=0.088deg)
SP219 IQGT* Synchronized tapping current loop gain magnification 1
SP220 IDGT* Synchronized tapping current loop gain magnification 2
SP221 PG2T Synchronized tapping position loop gain 2
SP222 PG3T Synchronized tapping position loop gain 3
<Servo parameters>
No. Abbrev.
SV049 PGN1sp Position loop gain 1 in spindle synchronous control
SV050 PGN2sp Position loop gain 2 in spindle synchronous control
SV058 SHGCsp SHG control gain in spindle synchronous control
POINT
5. Spindle Adjustment
Parameter name
Parameter name
Always adjust the synchronous tap control after adjusting the operation and
acceleration/deceleration time with the speed command, and adjusting the
servo axis controlled in synchronization with the spindle during synchronous tap
control.
SP009 = SV049
SP221 = SV050
SP222 = SV058
5 - 26
Setting Standard
Unit
range value
rad/s 1 to 100 15
Standard:
0000 to 0000
HEX
FFFF High-gain:
0100
0 to 1000 63
0 to 1000 60
0 to 1000 15
0 0
% 0 to 100 100
r/min 0 to 32767 0
% 0 to 1000 0
% 0 to 1000 0
% 0 to 1000 0
% 0 to 1000 0
r/min 0 to 500 50
pulse 0 to 10000 1
0 to 4095 0
1/16 deg 1 to 2880 16
pulse 0 to 32767 32767
% 0 to 1000 100
% 0 to 1000 100
rad/s 0 to 999 0
rad/s 0 to 999 0
Setting Standard
Unit
range value
rad/s 1 to 200 15
rad/s 0 to 999 0
rad/s 0 to 1200 0